Elements of Geometry and Conic Sections

ABCD altitude angle ABC angle ACB angle BAC base bisected called chord circle circumference coincide common cone consequently construct contained convex surface curve described diameter difference distance divided draw drawn ellipse equal equal to AC equivalent extremities faces fall figure foci formed four frustum given greater half hence hyperbola included inscribed intersection join less major axis manner mean measured meet multiplied opposite ordinate parallel parallelogram parallelopiped pass perpendicular plane plane MN polygon prism PROBLEM Prop proportional PROPOSITION proved pyramid radii radius ratio reason rectangle regular remaining represent right angles Scholium segment sides similar sphere spherical square straight line tangent THEOREM third triangle ABC vertex vertices VIII whole